#include "mystdio.h"
#define myfie "test.txt"
int main()
{
    _FILE *fp=_fopen("test.txt","w");
    if(fp==NULL) return 1;

    const char *msg = "hello world";

    _fwrite(fp,msg,strlen(msg));
    //fflush(fp);   
    _fclose(fp);

    return 0;
}
